Online circumference of a circle calculator - given a radius in mm, cm, meters, km, inches, feet, yards, miles, and others, calculate the circumference of any circle. Circumference of a circle formula and calculation steps.
The area, diameter and circumference will be calculated. Similarly, if you enter the area, the radius needed to get that area will be calculated, along with the diameter and circumference. Related measures Radius The radius is the distance from the center of the circle to any point on the perimeter. See radius of a circle.
The circumference of a circle is the distance around the shape. The ability to round a number to a number of decimal places or to a number of significant figures means that answers can be written to ...
Smithsonian Magazine: I am Pi: Thoughts on the Ratio of the Circumference of a Circle to Its Diameter
I am Pi: Thoughts on the Ratio of the Circumference of a Circle to Its Diameter
Pi is denoted by the Greek letter π. It is a mathematical constant and is approximately equal to 3.14159. It is defined as the ratio of a circle's circumference to its diameter. It was first ...
Use this free circumference calculator to find the area, circumference and diameter of a circle.
The circumference of a circle is the distance around the boundary of the circle. It is the same as calculating the perimeter of any polygon such as triangle, square, and rectangle. The circumference of a circle is measured in units of meters, kilometers, inches, etc. The diagram below shows the circumference of a circle.